Reread the Piano HAT features… Can you explain more how it works? It looks like to me that is similar to Samplerbox method, am I correct?
Brainstorming- if that is the case, use “Itty Bitty Beat Box” connect to Arturia Keystep… Look at glorious white bright LEDs blinking.
Here the paste from Pimoroni website for Piano Hat- way bottom of last paragraph.
“You can even make Piano HAT output regular MIDI commands via a USB to MIDI adapter and use Piano HAT as a tiny, cheap MIDI controller for your Minimoog Model D (you have one right?)”